989422720 has 256 divisors, whose sum is σ = 2930256000. Its totient is φ = 314081280.

The previous prime is 989422703. The next prime is 989422723. The reversal of 989422720 is 27224989.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (989422723) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1738596 + ... + 1739164.

Almost surely, 2^989422720 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 989422720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1465128000).

989422720 is an abundant number, since it is smaller than the sum of its proper divisors (1940833280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

989422720 is a wasteful number, since it uses less digits than its factorization.

989422720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 989422720 is about 31455.0905260182. The cubic root of 989422720 is about 996.4617354495.

The spelling of 989422720 in words is "nine hundred eighty-nine million, four hundred twenty-two thousand, seven hundred twenty".